diff -up texinfo-5.1/tp/t/converters_tests.t.orig texinfo-5.1/tp/t/converters_tests.t

--- texinfo-5.1/tp/t/converters_tests.t.orig	2013-02-19 23:25:47.000000000 +0100

+++ texinfo-5.1/tp/t/converters_tests.t	2017-10-02 14:57:40.692452831 +0200

@@ -707,6 +707,11 @@ explanation

 in para

 @image{f--ile,,,a very long alt argument that could span more than one line who knows}.

 '],

+['enumerate_above_ten',

+'@enumerate 14

+@item a

+@end enumerate

+'],

 ['footnote_no_number',

 '@node Top

diff -up texinfo-5.1/tp/Texinfo/Common.pm.orig texinfo-5.1/tp/Texinfo/Common.pm

--- texinfo-5.1/tp/Texinfo/Common.pm.orig	2013-02-25 22:20:23.000000000 +0100

+++ texinfo-5.1/tp/Texinfo/Common.pm	2017-10-02 14:57:40.689452828 +0200

@@ -1382,7 +1382,7 @@ sub enumerate_item_representation($$)

   my $specification = shift;

   my $number = shift;

-  if ($specification =~ /^[0-9]$/) {

+  if ($specification =~ /^[0-9]+$/) {

     return $specification + $number -1;

   }

diff -up texinfo-5.1/tp/Texinfo/Parser.pm.orig texinfo-5.1/tp/Texinfo/Parser.pm

--- texinfo-5.1/tp/Texinfo/Parser.pm.orig	2013-03-05 02:11:42.000000000 +0100

+++ texinfo-5.1/tp/Texinfo/Parser.pm	2017-10-02 14:57:40.691452829 +0200

@@ -2973,7 +2973,7 @@ sub _end_line($$$)

                         $current->{'cmdname'});

           }

           my $arg = $current->{'extra'}->{'block_command_line_contents'}->[0]->[0];

-          if (!defined($arg->{'text'}) or $arg->{'text'} !~ /^[[:alnum:]]$/) {

+          if (!defined($arg->{'text'}) or $arg->{'text'} !~ /^(([[:digit:]]+)|([[:alpha:]]+))$/) {

             $self->_command_error($current, $line_nr, 

                         $self->__("bad argument to \@%s"),

                         $current->{'cmdname'});

diff -up texinfo-5.1/tp/t/results/converters_tests/enumerate_above_ten.pl.orig texinfo-5.1/tp/t/results/converters_tests/enumerate_above_ten.pl

--- texinfo-5.1/tp/t/results/converters_tests/enumerate_above_ten.pl.orig	2017-10-02 14:57:40.691452829 +0200

+++ texinfo-5.1/tp/t/results/converters_tests/enumerate_above_ten.pl	2017-10-02 14:57:40.691452829 +0200

@@ -0,0 +1,191 @@

+use vars qw(%result_texis %result_texts %result_trees %result_errors 

+   %result_indices %result_sectioning %result_nodes %result_menus

+   %result_floats %result_converted %result_converted_errors 

+   %result_elements %result_directions_text);

+

+use utf8;

+

+$result_trees{'enumerate_above_ten'} = {

+  'contents' => [

+    {

+      'args' => [

+        {

+          'contents' => [

+            {

+              'extra' => {

+                'command' => {}

+              },

+              'parent' => {},

+              'text' => ' ',

+              'type' => 'empty_spaces_after_command'

+            },

+            {

+              'parent' => {},

+              'text' => '14'

+            },

+            {

+              'parent' => {},

+              'text' => '

+',

+              'type' => 'space_at_end_block_command'

+            }

+          ],

+          'parent' => {},

+          'type' => 'block_line_arg'

+        }

+      ],

+      'cmdname' => 'enumerate',

+      'contents' => [

+        {

+          'cmdname' => 'item',

+          'contents' => [

+            {

+              'extra' => {

+                'command' => {}

+              },

+              'parent' => {},

+              'text' => ' ',

+              'type' => 'empty_spaces_after_command'

+            },

+            {

+              'contents' => [

+                {

+                  'parent' => {},

+                  'text' => 'a

+'

+                }

+              ],

+              'parent' => {},

+              'type' => 'paragraph'

+            }

+          ],

+          'extra' => {

+            'item_number' => 1,

+            'spaces_after_command' => {}

+          },

+          'line_nr' => {

+            'file_name' => '',

+            'line_nr' => 2,

+            'macro' => ''

+          },

+          'parent' => {}

+        },

+        {

+          'args' => [

+            {

+              'contents' => [

+                {

+                  'extra' => {

+                    'command' => {}

+                  },

+                  'parent' => {},

+                  'text' => ' ',

+                  'type' => 'empty_spaces_after_command'

+                },

+                {

+                  'parent' => {},

+                  'text' => 'enumerate'

+                },

+                {

+                  'parent' => {},

+                  'text' => '

+',

+                  'type' => 'spaces_at_end'

+                }

+              ],

+              'parent' => {},

+              'type' => 'misc_line_arg'

+            }

+          ],

+          'cmdname' => 'end',

+          'extra' => {

+            'command' => {},

+            'command_argument' => 'enumerate',

+            'spaces_after_command' => {},

+            'text_arg' => 'enumerate'

+          },

+          'line_nr' => {

+            'file_name' => '',

+            'line_nr' => 3,

+            'macro' => ''

+          },

+          'parent' => {}

+        }

+      ],

+      'extra' => {

+        'block_command_line_contents' => [

+          [

+            {}

+          ]

+        ],

+        'end_command' => {},

+        'enumerate_specification' => '14',

+        'spaces_after_command' => {}

+      },

+      'line_nr' => {

+        'file_name' => '',

+        'line_nr' => 1,

+        'macro' => ''

+      },

+      'parent' => {}

+    }

+  ],

+  'type' => 'text_root'

+};

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[0]{'extra'}{'command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[1]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[2]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[0]{'extra'}{'command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[1]{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[1];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[1]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'extra'}{'spaces_after_command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'contents'}[0]{'extra'}{'command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'contents'}[1]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'contents'}[2]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'extra'}{'command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'extra'}{'spaces_after_command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'args'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1]{'parent'} = $result_trees{'enumerate_above_ten'}{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'extra'}{'block_command_line_contents'}[0][0] = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[1];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'extra'}{'end_command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'contents'}[1];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'extra'}{'spaces_after_command'} = $result_trees{'enumerate_above_ten'}{'contents'}[0]{'args'}[0]{'contents'}[0];

+$result_trees{'enumerate_above_ten'}{'contents'}[0]{'parent'} = $result_trees{'enumerate_above_ten'};

+

+$result_texis{'enumerate_above_ten'} = '@enumerate 14

+@item a

+@end enumerate

+';

+

+

+$result_texts{'enumerate_above_ten'} = '14. a

+';

+

+$result_errors{'enumerate_above_ten'} = [];

+

+

+

+$result_converted{'plaintext'}->{'enumerate_above_ten'} = '  14. a

+';

+

+

+$result_converted{'html_text'}->{'enumerate_above_ten'} = '

+
 a

+

+';

+

+

+$result_converted{'xml'}->{'enumerate_above_ten'} = '<enumerate first="14" spaces=" " endspaces=" "><enumeratefirst>14</enumeratefirst>

+<listitem spaces=" "><para>a

+</para></listitem></enumerate>

+';

+

+

+$result_converted{'docbook'}->{'enumerate_above_ten'} = '<orderedlist numeration="arabic"><listitem><para>a

+</para></listitem></orderedlist>';

+

+1;